Kia Optima Sportswagon (2015) is 25 mm (0.98 inch) longer, 32 mm (1.26 inch) wider, 25 kg (55 lbs) lighter and has 23 liters (0.81 ft3) bigger cargo space than Peugeot 508 (2014).
Peugeot 508 (2014) is 17 mm (0.67 inch) higher than Kia Optima Sportswagon (2015).